CN111002566A - Pipe bending traction forming mechanism - Google Patents
Pipe bending traction forming mechanism Download PDFInfo
- Publication number
- CN111002566A CN111002566A CN201911291028.4A CN201911291028A CN111002566A CN 111002566 A CN111002566 A CN 111002566A CN 201911291028 A CN201911291028 A CN 201911291028A CN 111002566 A CN111002566 A CN 111002566A
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- forming mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 238000005452 bending Methods 0.000 title claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 52
- 210000000078 claw Anatomy 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/08—Bending or folding of tubes or other profiled members
- B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention provides a pipe bending traction forming mechanism which comprises a rack, a fixed sleeve, a traction arm, a clamping jaw, a rotary seat rotatably connected to the rack, a driving motor and a driving assembly, wherein one end of the traction arm is connected to the rotary seat, the other end of the traction arm is connected with the clamping jaw, the driving motor is connected with the rotary seat to drive the rotary seat to rotate, and the driving assembly is used for driving and controlling the traction arm to stretch and contract and the clamping jaw to open and close. The bent pipe processed by the pipe bending traction forming mechanism provided by the invention has high integral structural strength and long service life.
Description
Technical Field
The invention relates to the technical field of pipe bending processing, in particular to a pipe bending traction forming mechanism.
Background
The pipe bending is completed by adopting a complete set of bending equipment, and is used in most of machine equipment and pipelines. At present, a hot melting welding mode is generally adopted when the PE bent pipe is processed, and the PE bent pipe processed by the mode has the characteristics of low overall structural strength and short service life.
In summary, how to improve the overall structural strength of the PE elbow is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a pipe bending traction forming mechanism, which solves the problem that the conventional PE bent pipe processed by hot melting welding has low overall structural strength.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a crooked shaping mechanism that pulls of tubular product, includes frame, fixed cover, draft arm, clamping jaw, rotates to be connected swivel mount, driving motor and drive assembly in the frame, the one end of draft arm is connected on the swivel mount, the other end of draft arm with the clamping jaw is connected, driving motor with the swivel mount is connected, in order to drive the swivel mount rotates, drive assembly is used for drive control the draft arm flexible and opening and fold of clamping jaw.
Further, the clamping jaw includes a pair of claw arms that the symmetry set up, claw arm is including the semiannular portion and the connecting rod portion that are connected, connecting rod portion is kept away from the one end rotation of semiannular portion is connected on the other end of trailing arm.
Furthermore, the driving assembly comprises a linear driving element, a sliding block and a pair of push-pull rods, wherein the linear driving element is arranged on the rotary seat, the sliding block is arranged on the traction arm in a sliding mode and is connected with the output end of the linear driving element, one end of each push-pull rod is pivoted on the corresponding sliding block, and the other end of each push-pull rod is pivoted on the corresponding claw arm.
Furthermore, the traction arm comprises a sleeve rod part, an inner rod part and a compression spring, the inner rod part is arranged in the sleeve rod part in a sliding mode, the compression spring is arranged in the sleeve rod part, and the compression spring enables the inner rod part to stretch out of the sleeve rod part.
Furthermore, one end of the sleeve rod part is connected with the clamping jaw, a stop block is arranged on the periphery of the other end of the sleeve rod part, and the linear driving element drives the sliding block to abut against the stop block to compress the compression spring.
Furthermore, the semi-annular part is also provided with a plurality of pressing components, each pressing component comprises a pushing part and a jacking spring, the pushing part is arranged on the semi-annular part in a sliding mode, and the jacking springs enable the pushing parts to be pressed against the outer wall of the pipe.
Furthermore, the compressing assembly further comprises a nut and an adjusting pressing block, the pushing part comprises a pushing rod part and a pressing plate part which are connected, the pushing rod part penetrates through the sliding hole of the semi-annular part and extends into the counter bore of the semi-annular part to be connected with the nut, the adjusting pressing block is installed in the counter bore, the pushing spring is sleeved on the pushing rod part and is located between the nut and the adjusting pressing block, and the pressing plate part is pressed against the outer wall of the pipe through the nut by the pushing spring.
Furthermore, a plurality of elastic sheets are arranged on the inner surface of the semi-annular part, the elastic sheets are detachably connected to the semi-annular part, and the elastic sheets are pressed on the outer wall of the pipe.
Furthermore, the spring pressing plate comprises a connecting part and an arched part which are connected, the free end of the connecting part penetrates through the communicating groove of the semi-annular part to be connected with a fastening strip which is installed in the square hole of the semi-annular part, and the outer peripheral surface of the arched part is pressed on the outer wall of the pipe.
According to the technical scheme, the invention has the following beneficial effects:
according to the pipe clamping device, when the clamping jaw clamps a pipe, the driving motor is started, the driving motor drives the traction arm to pull the pipe body to move and bend the pipe body through the transmission mechanism and the rotary seat, compared with the existing bent pipe formed through hot melting welding, the pipe clamping device is high in overall structural strength and long in service life, and the elastic pressing piece and the pressing component arranged on the clamping jaw are matched with each other, so that the pipe is clamped by the clamping jaw more reliably.
The invention is described in further detail below with reference to the figures and the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic front view of the present invention.
Fig. 3 is a partial structural schematic diagram of fig. 2.
Fig. 4 is a partial structural view of the claw arm of the present invention.
Fig. 5 is a partial structural view of fig. 4.
Fig. 6 is a schematic diagram of a partial structure of bitmap 4.
Description of reference numerals: the fixed sleeve 1, the frame 2, the traction arm 3, the sleeve rod part 31, the stopper 311, the inner rod part 32, the compression spring 33, the pivot block 34, the clamping jaw 4, the claw arm 41, the semi-annular part 411, the communicating groove 4111, the square hole 4112, the sliding hole 4113, the counter bore 4114, the connecting rod part 412, the driving rod part 413, the spring sheet 42, the connecting part 421, the arch part 422, the rolling part 423, the fastening strip 424, the arch support part 4241, the flat plate part 4242, the pressing component 43, the pressing component 431, the push rod part 4311, the pressing plate part 4312, the nut 432, the pressing spring 433, the adjusting pressing block 434, the through hole 4341, the swivel base 5, the driving motor 6, the transmission mechanism 7, the first cylindrical gear 71, the second cylindrical gear 72, the first bevel gear 73, the second bevel gear 74, the driving component 8, the linear driving element 81, the sliding block 82.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The invention is further explained with reference to fig. 1 to 6, and the pipe bending traction forming mechanism shown in fig. 1 comprises a fixing sleeve 1, a frame 2, a traction arm 3, a clamping jaw 4, a swivel mount 5, a driving motor 6, a transmission mechanism 7 and a driving assembly 8, wherein the pipe bending traction forming mechanism is arranged at an outlet of a pipe extruder, the fixing sleeve 1 is arranged on the frame 2, a straight pipe at the outlet of the pipe extruder penetrates through the fixing sleeve 1, the swivel mount 5 is rotatably connected to the frame 2, one end of the traction arm 3 is connected to the swivel mount 5, the other end of the traction arm 3 is connected with the clamping jaw 4, the driving motor 6 drives the swivel mount 5 to rotate through the transmission mechanism 7, and the driving assembly 8 is used for driving and controlling the extension and retraction of the traction arm 3 and the opening and closing.
In this embodiment, as shown in fig. 1, 2, and 3, the towing arm 3 includes a sleeve rod portion 31, an inner rod portion 32, a compression spring 33, and a pivot block 34, one end of the inner rod portion 32 extends into the sleeve rod portion 31 and is in sliding fit with the sleeve rod portion 31, the other end of the inner rod portion 32 is fixed on the rotation base 5, the compression spring 33 is disposed in the sleeve rod portion 31, and the compression spring 33 is always in a compressed state, the pivot block 34 is disposed on one end of the sleeve rod portion 31 away from the inner rod portion 32, and a stopper 311 is disposed on an outer periphery of one end of the sleeve rod portion 31 away from the pivot block 34.
In this embodiment, as shown in fig. 1, 2 and 3, the clamping jaw 4 includes a pair of symmetrically disposed clamping jaw arms 41, each clamping jaw arm 41 includes a semi-annular portion 411 and a connecting rod portion 412, the end of the connecting rod portion 412 away from the semi-annular portion 411 is rotatably connected to the pivot block 34 of the towing arm 3, and a driving rod portion 413 is connected to a side of the connecting rod portion 412 away from the other clamping jaw 4.
In this embodiment, as shown in fig. 1, fig. 2 and fig. 3, the driving assembly 8 includes a linear driving element 81, a sliding block 82 and a pair of symmetrically disposed push-pull rods 83, the linear driving element 81 is a cylinder, the linear driving element 81 is fixedly disposed on the rotation base 5, the sliding block 82 is sleeved on the loop rod portion 31 of the traction arm 3, and the slider 82 is connected to the output end of the linear driving element 81, one end of the push-pull rod 83 is pivoted to the slider 82, and the other end of the push-pull rod 83 is pivoted to the driving rod portion 413 of the corresponding claw arm 41, so that, in use, the linear driving member 81 operates a pair of push-pull rods 83 via a slider 82 to open or close the pair of gripper arms 41 of the gripper 4, and, after the linear driving element 81 drives the sliding block 82 to press against the stop 311, the output end of the linear driving element 81 continues to contract, and the sliding block 82 drives the sleeve rod portion 31 to move together, so that the compression spring 33 is compressed.
In this embodiment, as shown in fig. 4 and fig. 6, a plurality of pressing assemblies 43 are disposed on the semi-annular portion 411, each pressing assembly 43 includes a pressing member 431, a nut 432, a pressing spring 433, and an adjusting pressing block 434, each pressing member 431 includes a push rod portion 4311 and a pressing plate portion 4312, one end of each push rod portion 4311 is connected to the pressing plate portion 4312, the other end of each push rod portion 4311 passes through a sliding hole 4113 of the semi-annular portion 411 and extends into a counter bore 4114 of the semi-annular portion 411, each push rod portion 4311 is slidably engaged with the corresponding sliding hole 4113, an axis of each push rod portion 4311 is disposed along a radial direction of the semi-annular portion 411, an inner surface of the pressing plate portion 4312 is arc-shaped, the nut 432 is disposed in the counter bore 4114, the nut 432 is threadedly connected to the corresponding push rod portion 4311, the adjusting pressing block 434 is disposed in the counter bore 4114, the push rod portion 4311 of the pressing member 431 passes through a through hole 4341 formed in the adjusting pressing block 434, in the process of closing the pair of claw arms 41 of the claw 4, the tube pushing and pushing member 431 compresses the pushing and pressing spring 433, and then when the pair of claw arms 41 of the claw 4 are closed, under the action of the elastic force of the pushing and pressing spring 433, the pressing plate 4312 tightly presses against the outer wall of the tube, so that the tube is clamped on the claw 4, and in addition, when in use, a user can adjust the clamping force of the pressing component 43 on the tube by adjusting the pressing block 434.
In this embodiment, as shown in fig. 3 and 4, a plurality of pressing pieces 42 are disposed on the inner surface of the semi-annular portion 411, and the pressing pieces 42 are detachably connected to the semi-annular portion 411, when the pair of claw arms 41 of the clamping jaw 4 is folded, the pressing pieces 42 are elastically deformed and tightly pressed against the outer wall of the pipe, and the pressing pieces 42 assist the pressing assembly 43 to clamp the pipe, so that the clamping of the clamping jaw 4 on the pipe is more reliable.
In this embodiment, as shown in fig. 4 and 5, the pressing sheet 42 includes a connecting portion 421, an arch portion 422, and a rolling portion 423 that are connected, a free end of the connecting portion 421 passes through a communicating groove 4111 of the semi-annular portion 411 to be connected to a fastening strip 424 installed in a square hole 4112 of the semi-annular portion 411, one end of the square hole 4112 penetrates through an end face of the semi-annular portion 411, an outer arc surface of the rolling portion 423 abuts against an inner wall of the semi-annular portion 411, and an outer circumferential surface of the arch portion 422 abuts against an outer wall of the tube.
In this embodiment, as shown in fig. 4 and 5, the fastening strip 424 includes a flat plate portion 4242 and a pair of arched support portions 4241, the pair of arched support portions 4241 are symmetrically connected to the flat plate portion 4242, an outer arc surface of the arched support portion 4241 tightly presses against an inner wall of the square hole 4112, the fastening strip 424 is installed in the square hole 4112 by using friction, and the pressing piece 42 is convenient to replace.
In this embodiment, as shown in fig. 1 and fig. 2, the transmission mechanism 7 includes a first cylindrical gear 71, a second cylindrical gear 72, a first bevel gear 73 and a second bevel gear 74, the first cylindrical gear 71 is engaged with the second cylindrical gear 72, the first bevel gear 73 is engaged with the second bevel gear 74, the first cylindrical gear 71 is coaxially connected with the rotation base 5, the second cylindrical gear 72 is coaxially connected with the first bevel gear 73, and the second bevel gear 74 is connected with the output shaft of the driving motor 6.
In this embodiment, as shown in fig. 1, this bending traction forming mechanism for pipes' operating principle, the straight tube that the export of the pipe extruder passes through fixed cover 1, then start driving motor 6, driving motor 6 drives draft arm 3 through drive swivel mount 5 and changes to the clamping station, driving motor 6 closes afterwards, driving component 8 drives and controls draft arm 3 extension and orders about clamping jaw 4 to press from both sides tight pipe simultaneously, then restart driving motor 6, driving motor 6 drives draft arm 3 through drive mechanism 7 and swivel mount 5 and pulls the body and remove the bending formation, treat the bending formation back, driving component 8 orders about clamping jaw 4 and opens, and order about draft arm 3 simultaneously and shorten and make clamping jaw 4 keep away from the body.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a crooked shaping mechanism that pulls of tubular product, its characterized in that includes frame (2), fixed cover (1), draft arm (3), clamping jaw (4), rotates to be connected swivel mount (5), driving motor (6) and drive assembly (8) on frame (2), the one end of draft arm (3) is connected on swivel mount (5), the other end of draft arm (3) with clamping jaw (4) are connected, driving motor (6) with swivel mount (5) are connected, in order to drive swivel mount (5) rotate, drive assembly (8) are used for drive control the flexible of draft arm (3) and opening and foling of clamping jaw (4).
2. The pipe bending, pulling and forming mechanism according to claim 1, wherein the clamping jaw (4) comprises a pair of symmetrically arranged jaw arms (41), the jaw arms (41) comprise a semi-annular part (411) and a connecting rod part (412), and one end of the connecting rod part (412) far away from the semi-annular part (411) is rotatably connected to the other end of the pulling arm (3).
3. The pipe bending traction forming mechanism according to claim 2, wherein the driving assembly (8) comprises a linear driving element (81), a sliding block (82) and a pair of push-pull rods (83), the linear driving element (81) is arranged on the rotary seat (5), the sliding block (82) is slidably arranged on the traction arm (3), the sliding block (82) is connected with the output end of the linear driving element (81), one end of each push-pull rod (83) is pivoted on the corresponding sliding block (82), and the other end of each push-pull rod (83) is pivoted on the corresponding claw arm (41).
4. The tube bending traction forming mechanism according to claim 3, wherein the traction arm (3) comprises a shank portion (31), an inner shank portion (32) and a compression spring (33), the inner shank portion (32) is slidably disposed within the shank portion (31), the compression spring (33) is disposed within the shank portion (31), and the compression spring (33) causes the inner shank portion (32) to protrude out of the shank portion (31).
5. The pipe bending, pulling and forming mechanism according to claim 4, wherein one end of the sleeve rod portion (31) is connected with the clamping jaw (4), a stop block (311) is arranged on the outer periphery of the other end of the sleeve rod portion (31), and the linear driving element (81) drives the sliding block (82) to press against the stop block (311) so as to compress the compression spring (33).
6. The pipe bending and pulling forming mechanism according to claim 5, wherein a plurality of pressing assemblies (43) are further disposed on the semi-annular portion (411), the pressing assemblies (43) comprise a pressing member (431) slidably disposed on the semi-annular portion (411) and a pressing spring (433), and the pressing spring (433) presses the pressing member (431) against the outer wall of the pipe.
7. The tube bending traction forming mechanism according to claim 6, wherein the pressing component (43) further comprises a nut (432) and an adjusting pressing block (434), the pressing member (431) comprises a push rod portion (4311) and a pressing plate portion (4312) which are connected, the push rod portion (4311) extends into a counter bore (4114) of the semi-annular portion (411) through a slide hole (4113) of the semi-annular portion (411) to be connected with the nut (432), the adjusting pressing block (434) is installed in the counter bore (4114), the push spring (433) is sleeved on the push rod portion (4311), the push spring (433) is located between the nut (432) and the adjusting pressing block (434), and the push spring (433) presses the pressing plate portion (4312) against the outer wall of the tube through the nut (432).
8. The pipe bending, pulling and forming mechanism according to claim 6, wherein a plurality of spring plates (42) are arranged on the inner surface of the semi-annular part (411), the spring plates (42) are detachably connected to the semi-annular part (411), and the spring plates (42) are pressed against the outer wall of the pipe.
9. The pipe bending traction forming mechanism according to claim 8, wherein the spring plate (42) comprises a connecting portion (421) and an arch portion (422) which are connected, the free end of the connecting portion (421) passes through the communicating groove (4111) of the semi-annular portion (411) to be connected with a fastening strip (424) installed in the square hole (4112) of the semi-annular portion (411), and the outer peripheral surface of the arch portion (422) is pressed against the outer wall of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291028.4A CN111002566A (en) | 2019-12-16 | 2019-12-16 | Pipe bending traction forming mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291028.4A CN111002566A (en) | 2019-12-16 | 2019-12-16 | Pipe bending traction forming mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111002566A true CN111002566A (en) | 2020-04-14 |
Family
ID=70115376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911291028.4A Pending CN111002566A (en) | 2019-12-16 | 2019-12-16 | Pipe bending traction forming mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111002566A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113858583A (en) * | 2021-09-15 | 2021-12-31 | 山东东宏管业股份有限公司 | PVC series tubular product start-up draw gear |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2365925A1 (en) * | 1973-09-11 | 1977-02-10 | Albert Stewing | Thermoplastic pipe bends cut to length are mechanically handled - by turntable onto work-table in correct alignment |
| EP0993929A2 (en) * | 1998-09-17 | 2000-04-19 | McKechnie Components Limited | Bending of thermoplastic tubes using internal and external supports |
| CN205888467U (en) * | 2016-05-16 | 2017-01-18 | 天津市华彪金属制品有限公司 | Pipe fitting welding frock |
| CN106514694A (en) * | 2017-01-11 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Flexible mechanical paw |
| CN107571484A (en) * | 2017-09-23 | 2018-01-12 | 昊天节能装备有限责任公司 | The prefabricated direct-buried elbow of high density polyethylene (HDPE) seamless outer protection tube shaped device and its moulding process |
| CN207077786U (en) * | 2017-07-27 | 2018-03-09 | 河北日腾飞管业有限公司 | Bending pipes draw shaping mechanism |
| CN108465992A (en) * | 2018-03-23 | 2018-08-31 | 浙江工贸职业技术学院 | A kind of grasping system for tooth material |
-
2019
- 2019-12-16 CN CN201911291028.4A patent/CN111002566A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2365925A1 (en) * | 1973-09-11 | 1977-02-10 | Albert Stewing | Thermoplastic pipe bends cut to length are mechanically handled - by turntable onto work-table in correct alignment |
| EP0993929A2 (en) * | 1998-09-17 | 2000-04-19 | McKechnie Components Limited | Bending of thermoplastic tubes using internal and external supports |
| CN205888467U (en) * | 2016-05-16 | 2017-01-18 | 天津市华彪金属制品有限公司 | Pipe fitting welding frock |
| CN106514694A (en) * | 2017-01-11 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Flexible mechanical paw |
| CN207077786U (en) * | 2017-07-27 | 2018-03-09 | 河北日腾飞管业有限公司 | Bending pipes draw shaping mechanism |
| CN107571484A (en) * | 2017-09-23 | 2018-01-12 | 昊天节能装备有限责任公司 | The prefabricated direct-buried elbow of high density polyethylene (HDPE) seamless outer protection tube shaped device and its moulding process |
| CN108465992A (en) * | 2018-03-23 | 2018-08-31 | 浙江工贸职业技术学院 | A kind of grasping system for tooth material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113858583A (en) * | 2021-09-15 | 2021-12-31 | 山东东宏管业股份有限公司 | PVC series tubular product start-up draw gear |
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Application publication date: 20200414 |